<template>
  <view>
    <!-- 搜索框 -->
    <view class="search-box">    
      <uni-search-bar @input="input" :radius="100" cancelButton="none" :focus="true"></uni-search-bar>          
    </view>
    <!-- 搜索建议 -->
    <view class="sugg-list" v-if="searchResults.length !== 0">
      <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
        <view class="goods-name">
          {{item.goods_name}}
        </view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 历史记录 -->
    <view class="history-box" v-else>
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="cleanHistoryList"></uni-icons>
      </view>
      <view class="history-list">
        <uni-tag v-for="(item,i) in historys" :text="item" :key="i" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
  </view>
  
</template>

<script>
  export default {
    data() {
      return {
        timer:null,
        kw:'',
        searchResults:[],
        historyList:['apple','电器','a']
      };
    },
    methods:{
      input(e){
        clearTimeout(this.timer)
        this.timer=setTimeout(()=>{
          this.kw=e
          this.getsearchResults()
        },500)
      },
      async getsearchResults(){
        if(this.kw===''){
          this.searchResults=[]
          return
        }
        const { data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
        
        if(res.meta.status!==200){
          return uni.$showMsg()
        }
        this.searchResults=res.message
        this.saveSearchHistory()
      },
      // 跳转详情
      gotoDetail(id){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' + id
        })
      },
      // 保存历史记录
      saveSearchHistory(){
        const set =new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList=Array.from(set)
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      // 清除历史记录
      cleanHistoryList(){
        this.historyList=[]
        uni.setStorageSync('kw','[]')
      },
      // 跳转商品列表
      gotoGoodsList(kw){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query=' + kw
        })
      }
    },
    computed:{
      historys(){
        return [...this.historyList].reverse()
      }
    },
    onLoad() {
      this.historyList=JSON.parse(uni.getStorageSync('kw')||'[]')
    }
    
  }
</script>

<style lang="scss">
  // 搜索框
  .search-box{
    position: sticky;
    top:0;
    z-index: 999;
    background-color: #c00000;
  }
// 搜索建议列表
  .sugg-list{
    padding: 0 5px;
    
    .sugg-item{
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 13px 0px;
      border-bottom: 1px solid #efefef;
      .goods-name{
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin-right: 3px;
      }
    }
  }
  // 搜索历史
  .history-box{
    padding: 0 5px;
    .history-title{
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 40px;
      border-bottom: 1px solid #efefef;
      font-size: 13px
    }
    .history-list{
      display: flex;
      flex-wrap: wrap;
      .uni-tag{
        margin-top: 5px;
        margin-right: 5px;
      }
    }
  }
</style>
